Ideas Grab - A list of +3400 ideas that you can get for your projects.
Startup Stash - A curated directory of 400 resources & tools for startups
The 25 Days of Ideas - Free resources for coming up with startup ideas
Content Marketing Stack - A curated directory of content marketing resources
Validated ideas - List of 5,000 poorly executed but popular apps
The Influencer Marketing Stack - Free resources to launch a killer campaign